For those not entirely aware of the serpent seed doctrine, it is a doctrine which states that the original sin; Eve's transgression, was laying with the serpent satan , who impregnated her with Cain. The doctrine also states that member's of Cain's lineage are still around today. Naturally, many Christians tend to see this doctrine as complete bull, or only half bull. Some say that satan could have never impregnated Eve; while others say that it was possible, but that Cain's lineage died out in the flood.